// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package elastic

import (
	"encoding/json"
	"fmt"
	"gitee.com/go-wares/log/base"
	"gitee.com/go-wares/log/conf"
	"math/rand"
)

type Indices struct {
	Index struct {
		Id    string `json:"_id"`
		Index string `json:"_index"`
		Type  string `json:"_type"`
	} `json:"index"`
}

// Format
// returns a string for elasticsearch indices for bulk mode.
func (o *Indices) Format(item *base.Item, i int) []byte {
	c := conf.Get()

	// Generate
	// index type with configuration.
	o.Index.Type = c.ElasticAdapter.IndexType

	// Generate
	// index name with logger time.
	o.Index.Index = item.Time.Format(c.ElasticAdapter.Index)

	// Generate index id.
	o.Index.Id = fmt.Sprintf("%d-%d-%04d", item.Time.UnixNano(), rand.Intn(99999999), i)

	if body, err := json.Marshal(o); err == nil {
		return body
	}
	return nil
}
